I have tan interior parts when you need. Seems odd that the truck got messed up after you bought it when it looks like it sat a while, sucks.
I'm no expert on the trim packages and option options so can't be of much help with that. Based on what I've seen I would say it is an LS though. Seats and bouncy base, chrome grill and headlight washer maybe LS only? Do you have a gas door opener under the steering wheel too?
I scrapped a caravan block too. Seemed like more trouble then it was worth with it being a bit different FWD van vs RWD montero. I got another spare 3.0 montero engine to rebuild that was the other reason I scrapped it.